System of air compression



Jan. 23, 11923.

J. AALTO. SYSTEM OF A'IR COMPRESSION.

FILED APR 9 1921 km N pellers.

Patented d b'lllh- 2d, lWL-El.

JMKKO AAL'IO, 0F MILLINOCKE'I, MAINE.

SYSTEM OF AIR COMPRESSION.

Application filed April 9, 1921. Serial No. 4(60,133.

To all w/zom it may concern Be. it known that I JAAKKo AALTO, a citi zen oi? the Republic of 1* inland, residing at Millin'ocket, in the county of Penobscot and State of Maine, have invented certain new and. useful Improvements in System of Air Uompressiom of which the following is a specification.

The invention relates to improvements in compressors generally, and more particularly to a dual system of air compression :tor

. the storing up of a supply of compressed air for subsequent use.

The principal object of the invention is to provide for a system of air compression, and one embodying the use oi? a. pair of oppositely disposed con'ipressors, each having means associated therewith to greatly increase the volume of air to be drawn into the compression cylinders thereoli. and to otherwiseincrease the etlicieucy ot the apparatus as a whole over known. types of the same;

A further 3 object of the invention is to provide for an air compression ap niratus of the character mentioned, and one involving a pair of power driven intake devices or impellers whereby air is forcibly drawn from atmosphere, and is partially compressed during its passage into the compression cylinders,such partial compression ol the an: acting to increase the density or volume of air adii'iittedv to the cylinders during the suction stroke oi. the pistons of the same.

With the foregoing" and other objects in view, the invention resides in thecertain novel and useful construction and, arrangement of parts as will be hereinafter more :lullv described. set forth in the appended cl as. and illus "dad in the accoinpany i'igr drawing in which Figure l. vertical sectional view of an apparatus in accordance withthis invention,

and

Figure 2 is an end view oi one oi. the 1m" Rel: raring to the drawing, the numerals l0 and 11. designate a pair of opposed compression, cylinders open at their inner adjacent ends to receive within the same compleinental piston heads .12 and 13, which are to be reciprocated therein through the mediuu'i of pitmans or piston rods 14-. and 15, respectively. These pitmans or pistonrods 14: and 15 are pivotally connected at points centrally ot' the outer ends of the piston heads 12 and 13, as at 16 and 17, and. have a com mon pivot connection, as at 18, to a drive wheel l9,which is'in. the form of a beveled gear mounted on. a shaft 19' and arranged in mesh with a bevel pinion 20, mounted on a power shaft The gear wheel 19 is also in mesh with a bevelled pinion 20 carried by a transmission shact't 21 which is disposed in longitudinal alignment with respect to the shaftill. The shafts 21 and 21 extend between the opposed endsof the cylinde-rs'lll and 11 in a plane at right angles to the longitudinal centers thereof. Each of the cylinders 10 and 11 have their closed end. walls provided with valved inlet ports 22 and 23 and valved outlet ports 24 and 25, respee tively, and connecting these several valved ports are inlet and outlet pipes 96 and 27- and 28 and 29, respectively.

Each inlet pipe 26, 27, is an element of a pumping mechanism and. each ol said mechanisms consists ot a flanged hemispherical outlet head 30 to which the pipe 26 or 27 is connected. Each oi. the said mechanisms further inch'ldes a rotatable hollow cylindrical body 2:32, open at each end and having one end opening into and operating against the outlet head 30, the latter being stationary and fixedlysecured to a bearing; Mounted in. the bearing 33 and also in :1. bearing 33, is the cylindrical body 32. Mounted in the rotatable body 32, as Well as being carried therewith, is a spiral piiin'sping elen'ient or device The body 32 is rotated through the medium of a pulley 34- carried on or'keyed to the sleeve or casing: 82 at a point intermediate its end, and between the bearing blocks33 and. 33'. Belts 35":110 provided For driving the impellers the lini'iner leads 'l'roni tl'ie pulley ih'i on t e shaft and the latter from the pul ley 36 on the shaft 21. r The belts 85;35 are connected to the pulleys 34-.

Connected. to the outlet pipes 28. 29, are storage tanks 37, 37 respectively and each. of said tanks provided. with a valved. inlet 38 associated with its respective outlet pipe from. the compressor. Each of the tanks 37, 37, is provided with an outlet 39, with which cooperates a safety valve 39, which. is carried by a lever arm 40, intermediate the ends of the latter. The valves 39 are pivoted to the lever arms 4:0. The lever arms 40 are pivoted to the storage tanks as at ll, and each of said lever arms 40, has its outer free end provided with an adjustable weight 43,

capable of being adjusted along the outer end of the lever arm 41:0, for the purpose oli counterbalancing the weight of the outlet valves.

In the operation of the system of air compression involved in the use of the apparatus thus provided, suitable power is applied to the shalt 21., and air is alternately drawn into the cylinders 10 and 11, one cylinder being on its compression stroke when the other is on its suction or intake stroke. Upon the starting up of the rotation of the power shaft 21, the belts 35, are driven from the pulleys 36, 36 for the rotation of the spiral impellers 31, in a direction to draw in the air from the surrounding atmosphere and force the same in the cylinders during the suction stroke of the pistons therein, as aforesaid. On the compression stroke of the pistons, the air is compressed through the valved outlet openings 24 and 25, and is dis 7 charged, through the outlet pipes 28 and 29 leading therefrom, into the tanks 37, 37. The safety-valves 39 are properly counterbalanced by the adjustment of the weights 4-2 in the lever arm 4:0, so as to open under pressures exceeding that predetermined by the setting off the same, so that all danger from over compression is eliminated. The action of the spiral impellers or intake devices 31 is such as to greatly increase the volume or density oi the air passing through the cylinders as compared to that which would otherwise be drawn into the latter merely under the suction stroke of the pistons, and, in addition to increasing the volume, these impellers or devices also eiiect a partial. compression of the air for increasing the density thereof in its passage through the inlet pipes 26 and 27 to the cylinders, with the result that a. larger body or volume of air is sucked in each cylinder during the non-compression stroke of the pistons.

From the foregoing, it will be readily apparent that the apparatus provides for a very efficient system of air compression, and one that is capable of compressing and storing up a maximum amount of air from an apparatus of a relatively small capacity,

such as results in extremely low cost in manufacture, installation and operation oi the apparatus, since the provision Oil the dcvires for increasing the density, or otherwise partially compressing the air to increase the volume admitted to the compressor cylinders is in effect a corresponding increase in the capai-ity of the latter.

Having thus fully described the invention, what is clain'ied, is

1. An apparatus for the purpose set forth comprising bearing means, a hemispherical stationary outlet head fixed thereto and provided with a discharge pipe, a rotatable hollow cylindrical body mounted in. said means, open at each end and having one end opening into and bearing against said outlet head, a pumping device of spiral form arranged within and carried with said element, and operating means for said element.

2. An apparatus for the purpose set forth comprising a pair of spaced bearings, a ho]- low hemispherical outlet head fixed to one of said bearings and provided with a discharge pipe, a rotatable hollow cylindrical body mounted in said bearings and open at each end, said body opening at one end into and bearing against said head, means engaging with said body between said bearings for rotating said body, and a pumping element arranged within and carried with said body during the operation of the latter.

3. An apparatus for the purpose set forth comprising a pair of spaced bearings, 11 hol low hemispherical outlet head fixed to one of said hearings and provided with a discharge pipe, a rotatable hollow cylindrical body mounted in said bearings and open at each. end, said body opening at one end into and bearing against said head, means engaging with said body between said bearings for rotating said body, and a pumping element of spiral form arranged within and extending from one end to the other of said body and further carried with the body during the operation thereof.

In testimony whereof I afiix my signature hereto.

JAAKKO AALTO 

